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//
// RustLogging.swift
// MullvadRustRuntime
//
// Created by Emīls on 2026-01-09.
// Copyright © 2026 Mullvad VPN AB. All rights reserved.
//
import Foundation
import MullvadLogging
/// Global logger instance for Rust logs
private let rustLogger = Logger(label: "Rust")
/// C-compatible logging callback function.
/// This must be a global function (not a closure) to be passed as a C function pointer.
private func rustLogCallback(level: UInt8, messagePtr: UnsafePointer<CChar>?) {
guard let messagePtr else { return }
let message = String(cString: messagePtr)
let level: Logger.Level =
switch level {
case 1:
.error
case 2:
.warning
case 3:
.info
case 4:
.debug
case 5:
.trace
default:
.debug
}
rustLogger
.log(
level: level,
"\(message.trimmingCharacters(in: .whitespacesAndNewlines))"
)
}
/// Initializes the Rust logging system to forward logs to Swift's Logger.
///
/// This function should be called once early in the application lifecycle,
/// before any Rust code that uses logging is invoked.
public enum RustLogging {
/// Initialize Rust logging to forward to Swift Logger.
/// Safe to call multiple times - only the first call has effect.
public static func initialize() {
init_rust_logging(rustLogCallback)
}
}
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